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Test your basic knowledge |
Dairy Cattle And Reproduction
Start Test
Study First
Subjects
:
industries
,
dairy
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Can survive ~7 days in cow. vast majority <48 hours
why does the cow need fat deposits during pregnancy?
Brown Swiss Cow
Sperm survival specs
dry-off time in dairy cattle
2. Standing to be mounted (last one able to notice); mounting other animals; social behavior-restless - gregarious - activity - vocalizing; frequent urination; mucous discharge
ewe estrus
penis sizes vs delivering methods
behavioral signs of estrus
sow estrus cycle
3. 19-23 (21) days
6-8 weeks
testosterone
mare's estrous cycle
sow estrus cycle
4. Sperm is produced here
what has to happen for males for copulation to occur
seminiferous tubules
sow estrus
sow gestation
5. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed
effects of BST
Avg. bull specs
sow estrus
hypothalamus and pituitary gland
6. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)
seasonally polyestrous
feeding a high producing dairy cow
ewe gestation
Blood
7. Not under a timeline - cow can not be sold as steak
dartos muscle
vulva
Grading choice
Where livelihood is in agriculture
8. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.
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9. Can survive ~7 days in cow. vast majority <48 hours
Grading choice
Sperm survival specs
6-8 weeks
humans: stress level vs sperm
10. 4-6 days
ewe's estrous cycle
monestrous
mare estrus
Grading choice
11. Animal which has been castrated after puberty
Mares
spermatogenesis
stag
Lutinizing Hormone in females
12. Start of the reproductive tract for the female. located outside of the body
vulva
monorchid
Brown Swiss Cow
Hard
13. Front feet and head first. (except for hogs and dogs)
normal presentation of the fetus
sow estrus cycle
scrotal circumference (BSE)
retractor muscles
14. Microscopic - make sure not sterile - very few bulls are actually tested
semen evaluation (BSE)
mare estrus
6-8 weeks
Bull's fibro-elastic penis
15. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.
feeding a high producing dairy cow
van deferens
vulva
cryptorchid
16. (LH) causes female's egg to break (her period)
Lutinizing Hormone in females
effects of BST
seasonally polyestrous
vulva
17. What helps regulate spermatogenesis?
Jersey Cow
estrus
sow estrus cycle
testosterone
18. (FSH) causes egg to mature in females
Parturition
sertoli cells
penis proper
Follical Stimulating in females
19. Male on one pin and female on other side
mare estrus
libido test (BSE)
Hard
6-8 weeks
20. FEED
reason for seasonal breeding periods
#1 cost in production
cow ovulation
oviducts
21. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.
pelvis
castration
spermatogenesis
growth lost from castration methods (knife & band)
22. 265-285 days
cryptorchid
Parturition
Dairy Cattle Gestation
oviducts
23. Milk ~305 days - dry 60 days prior to calving
Dairy Cattle milking schedule
Lutinizing Hormone in males
retractor muscles
monorchid
24. 1-2 days
Culls bulls earlier (2 reasons)
ewe estrus
dartos muscle
estrous
25. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg
sperm cell
castration
monorchid
cryptorchid
26. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders
Mares
seasonally polyestrous
mare estrus
seminiferous tubules
27. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.
colostrum
Parturition
Sperm survival specs
sertoli cells
28. Contains and regulates the temp of the testes for sperm production
Follical Stimulating in males
eminal vesicles
scrotum
scrotal circumference (BSE)
29. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.
testis (gonads)
sigmoid flexure
estrous
Reasons for gestation length being affected
30. Duct through penis that carries sperm and urine
mare gestation
rectal palpation (BSE)
urethra
spermatogenesis
31. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.
Holstein Cow
Size of cow in relation to the amount of milk produced
retractor muscles
~1 month
32. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.
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33. What makes the milk flow through the mammary glands?
Holstein Cow
epididymis: definition - 3 parts - 4 functions
sow gestation
Blood
34. 26 hours after estrus begins
retractor muscles
ewe ovulation
Brown Swiss Cow
purpose of Breeding Soundness Exam (BSE) for males
35. Allows extension of penis without fibro-elastic penis
ewe's estrous cycle
sigmoid flexure
effects of estrogen
elastrator
36. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood
penis proper
cremaster muscle
ewe's estrous cycle
stag
37. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)
feeding a high producing dairy cow
cervix
cryptorchid
cow gestation
38. 336 days
ewe estrus
mare gestation
growth lost from castration methods (knife & band)
burdizzo
39. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat
Holstein Cow
age and castration
mare's estrous cycle
scrotal circumference (BSE)
40. 1. brain function - 2. blood flow - 3. willing female
dry-off time in dairy cattle
what has to happen for males for copulation to occur
leydid or interstitial cells
age and castration
41. % of fat in milk. makes cheeses and ice cream. regulates cost of milk
Dairy Cattle Lactation (standard)
butterfat
mastitis
mare ovulation
42. Animals which have only one estrous cycle (ex: dog - fox)
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
feeding a high producing dairy cow
monestrous
vagina
43. Prevent the cow from getting an infection from the calve
burdizzo
hormones
Dairy calves are removed from cow at birth to...
#1 cost in production
44. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).
growth lost from castration methods (knife & band)
butterfat
normal presentation of the fetus
hormones
45. Parturition is controlled by...
Avg. bull specs
cow gestation
Hormones from both the fetus and the mom.
what has to happen for males for copulation to occur
46. Days which have decreasing daylight hours
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47. Depository for semen during insemination. where urine leaves the body
vagina
penis sizes vs delivering methods
Avg. bull specs
purpose of Breeding Soundness Exam (BSE) for males
48. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.
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49. Luteolysis happens because of the ____________ hormone
#1 cost in production
Reasons for gestation length being affected
Brown Swiss Cow
prostaglandin
50. Urinary calculi.
butterfat
mare estrus
kidney stones also called ________ ___________ can develop in the sigmoid flexure
Hormones from both the fetus and the mom.